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NDA2017MathematicsQuadratic EquationActual

If and are the roots of the equation x^2+b x+c=0 with b 0 , then the value of ( + ) is

Options

  1. Ac -1 ~b
  2. B1 -c ~b
  3. Cb c -1
  4. Db 1 -c

Correct answer

B. 1 -c ~b

Step-by-step solution

aligned & Given equation, x ^2+ bx + c =0 & Roots are , & Sum of roots = + =-b & Product of roots = =c & ( + )= -1 + = c-1 -b = 1-c b aligned

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